If rail pressure is higher than what the IFR table was programmed for, then the injectors will flow more than what the PCM expects...
but, in Closed Loop trimming brings the the fueling to stoichiometric which means HC should be lower than what you see...
so, I'm confused, lol.
Last edited by joecar; October 5th, 2010 at 09:42 AM.
could it be overflowing/floating? regardless of what is commanded, maybe the regular is not doing his job properly.
I just bought a fuel pressure regulator with gauge on it, so will give a try tomorrow. The rail pressure should be @ 58 psi right?
If the injectors were leaking, the trims would peg negative and a DTC would set.
Yes, stock rail pressure is 58 psi.
Post some more logs showing driving at 35-45 mph in 3rd (automatic) or 4th (manual) gear.
I've got this sometime back, but should contain a similar data of cruising. Let me know if it is useful?
Can you log IBPW at idle to ensure you are not pegging a minimum limit?
The Tremor at AIR
I've done that as some point, and here is the log.
Thanks
I cant get much from that log sorry as there is no real pids logged to get a reference from. Something like your 02 log with IBPW instead of IAC position would be better. Also it might be worth you reading this link I just found. http://www.ratwell.com/mirror/interro/techgas.html
Ok, today I've managed to install my Fuel Pressure Gauge, and below are the details. do you think I'm fine with that? if not what else might be affecting my HC level (rich fuel) where my LTFT is around -4
I've even tried to change the AFR via DVT to 17-19 but nothing has happened. I'm still thinking that the fuel regulator could be an issue? any ideas guys? stuck with this emissions test really :(
At Idle:
Ignition On - Engine Off
Does your FPR have a manifold reference hose (i.e. is it a return style FPR)...?
What car do you have...?
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